Finishing machine



May 19, 1942- E. TOPHAM ETAL FINISHING MACHINE Filed May 17, 1940 2 Sheets-Sheet l y 1942- L. E. TOPHAM ETAL ,2

FINISHING MACHINE Filed May 17, 1940 2 Sheets-Sheet 2 Patented May 19, 1942 paired STATES PATENT OFFICE FINISHING MACHINE Laurence E. Topham, Wenham, and Edwin W. Smith, Beverly, Mass., assignors to United Shoe Machinery Corporation, Borough of Flemington, N. J a corporation of New Jersey Application May 17, 1940, Serial No. 335,756

10 Claims.

ruary 20, 1940, on application of L. E. Topham.

Edge setting machines are customarily provided with two differently-shaped burnishing tools which are alternately used to operate on different sections of the sole edge, these tools being carried in a holderwhich can be released from the customary oscillating shaft for rotation to interchange the tools. It is also customary to provide tool heating means such as gas jets, for example, which are located on opposite sides of the tool holder adjacent to the path traversed by the tool when the tool holder is coupled to the oscillating shaft. As the adjustment of the heating means is rather critical, the operator usually adjusts it at the beginning of the days work and then leaves it set while the machine is in operation. This results in the tools becoming overheated when the machine is temporarily idle for one cause or another. With this in View, a fur,- ther feature of this invention consists in the provision of means for moving thetool holder to a position where the tools are removed from heating proximity to the heating means and for holding them in that position while the machine is idle. As illustrated, that means consists of a stop which is movable into the path traversed by the tool holder when the tools are shifted, the stop being .arrangedto interrupt the rotation of the tool holder in a positionwhere both tools are spaced a substantial distance from the heating means.

The illustrated machine is provided with tool holder shifting means of a type now'in general use which includes oppositely-inclined surfaces on the oscillating shaft that extend between the two tool holder lug receiving notches. When the tool holder is rotated to interchange-the tools, the lugs on the tool holder ride down the inclined surface until they reach the lug receiving notches. When the rotation of the tool holder is interrupted by the above mentioned stop, the lugs are held stationary while the shaft continues to oscillate with the result thatwear'will soon develop between the lugs and the inclined er. With this in view, it is a further object of this invention to prevent excessive wear. between the tool holder lugs and the inclined surfaces on the .oscillatingshaft at the stopped position, of the tool holder. To this end, the illustrated stop is swingably mounted and is provided with a shouldered portion which is arranged to engage beneath a portion of the tool holder and to move the tool holder outwardly from the oscillating shaft when it stops the rotation of the tool holder. This outward movement of the tool holder separates the lugs on the tool holder from theto the accompanying drawings and will be pointed out in the appended claims. In thedrawings,

Fig. 1 is an angular view of a portion of an I edge'setting machine embodying features of this invention;

2 is a fragmentary tailsof the backstop mechanism which prevents reverse rotation of the'tool holder during the tool shifting operation;

l Fig. 3 is an elevational view looking toward the left side of the mechanism shown in Fig'fl and illustrating the position of the partsat the beginningof the operation of the stop member; and g Fig. 4 is a view similar to Fig. 3 showing the position of the parts when the stop member is in the position in which it holds the tool holder while the tools are idle. p p f In the illustrated construction, 10 (Fig. 4) indicates an oscillating shaft which is rotatably mounted in a bearing l2 and is oscillated back and forth at a high rateof speedby a driving mechanism of the type illustrated in the above surfaces at the stopped position of the tool holdably and rotatably mounted in the shaft [0 is a spindle M which projects fromv a tool holder IB,-- the tool holder being'urged inward in the direction of the shaft I0 by a spring l8 which is mounted in a cylindrical opening in the spindlel4. The shaft l0, bearing I2, spindle l4,

and spring |8 correspond respectively tothe oppositely-disposed notches 22, 24 (Fig. 1) which elevation showing deform part of the driving connection that causes the tool head to move in unison with the oscillating shaft. The remainder of the driving connection is formed by a pair of lugs 25, 28 which depend from the tool receiving portions of the tool holder l6 and are held in the notches 22, 24 by the action of the spring is. Attached to and forming a part of the head 20 are a pair of oppositely-inclined arcuate plates 30, 32 which extend obliquely to the direction of oscillation of the shaft, the plates being located so that their ends form the side walls of the notches 22-, 24.

These plates are attached to the-head 20. by.

screws 34 and form runways; down which the bottoms of the lugs '26, 28 ride when the tools are shifted.

The tool holder is rotated through 180 to.

change the tools by a shifting lever 36'which is fulcrumed on a pin 38 mounted on a bracket, 40

'which extends outwardly from the bearing l2.

The lever 36 has a pair of spaced arms 42, 44 which extend inwardly along opposite sides of the tool head to points behind the notches 22, 2:1!

"clined faces on flanges Fit-formed on the outer ends of the lugs 26, 28 and corresponding to the oblique faces 66 provided for a similar purpose in the machine illustrated in Letters Patent of the United States No.1,98 6,968, granted January 8, 1935, on an application filed in the name of William Hamann. When it is desired to change the tools, the shifting lever is rocked in a counterclockwise direction (as viewed in" Fig. 2) causing the rollers 46, 48 to strike the inclined faces 5| on the flanges 50 and to move the tool holder outwardly against resistance of the spring I8 until the lugs 26, '28are clear of the notches closed in the above identified Topham patent with the result that considerable wear develops between the tool carriers and the tools. As the overall movement of the tool is very small, being in the neighborhood-of of an inch, eventually the wear between the tool and the tool carrier reduces the movement of the tool to a negligible amount, rendering the tool useless so that it must be discarded. This difiiculty is overcome by the tool clamping device illustrated herein which holds 'the tool firmly on the tool carrier and prevents relative movement between those members when the action of the rollers 46, Non the inclined faces of the'flanges will 'movejthe tool holder in a clockwisedirection, as viewed in'Fig.

1, until the bottoms of the lugs 26, 23- are placed on the high ends of the inclined plates 30', '32

The tool holder willthen be shifted through 180 in a manner which is fully, describedin'the above L mentioned patent to Hamann No.' 1-,986,968;

The tool holder continues to oscillate. at a high rate of speed as the lugs26; 28 are-moved outwardly from thenotches in the head of theoscillating shaft and occasionally; as "the lugs, reach arm 42 is provided with a finger 52- which extends behind a laterally projecting-rib '54 which is formed on the outer face of the flange '50.

The finger 52 (Fig.2) ;islocated suff ciently far behind the rib E i-"so thatit willnotinterfere all I with the movement of the ribwhen the lugs are seated in the notches in' the oscillating shaft, and isof sufiicient height so that it extends behind the rib-54 at all times during the movement-"of the lugs out of the notches. Thus the finger 52 positively prevents backward or counterclockwise 7 movement of the tool holder lugs over the rollers 46, 48- inasmuch as the rib 54 strikes the finger before the lugs pass over the high points of the rollers and stops their backward movement.

Thelugs 26, 28" on the tool holder each have an outwardly extending portion whichterminates in a cylindrical headhaving a downwardly-and when they are oscillated at a high rate of speed.

The clamping device consists of a shoulder 66 which extends from one side of the enlarged tool carrier head where it is adapted to engage one side of a burnishing tool 68. The opposite side of the tool 60 is engaged by the roughened face.

' head, is recessed from a point a'slight distance beyond the end ofthe head adjacent to the tool to the-rib Mon the-end of the plate. When the screw 12 is tightened, the plate 10 will fulcrum about the rib 14 causing the roughened-partof the plate to press the tool against the shoulder 66 thereby clamping the tool between them so that there can be no relative movement between the tool and the tool carrier when the tool holder isosc'illated. V a 1 The tool" carrier spindles 56,58-are permitted a, limited" amount of rotative and axial movement in their bearings which allows them to fol- 10W the changes in curvature occurring about the sole edge. Inward movement of the spindles is resisted. by balls 16' (Fig. 1) carriedby the outer ends of springs 18, the balls. being located'behind theiinner ends of the tool carrier spindles and being urged-in an outward direction by the .springs; Rotation of, the tool carrier spindles is resisted by the lower ends of apair of depending arms 80, 82 which extend from alight plate of s ring material 84 and engage the flat surfaces 60 formed on the inner ends'of the spindles. The Y I plate 84 extends transversely to. the arms 80, 82 andis provided at its oppositeendswith openings that fit around the ends of posts 86,- 88 which also serve as mounting; means for the springs 18 By using the light plate-of spring material 84 -and locating. it centrally of the tool holder, the relatively heavy eccentrically-locatedspringpressed latches, whichhave heretofore been used yielding-1y toresist rotation of "the tool carrier spindles, have been eliminated thereby reducing the inertia of the tool holder and the'vibrations 7 caused by the frequent reversals in the direction of itsmotion; I I

Theineans for: clamping the tools to the tool carriers and the means forlocating the carriers centrally in'. thetool holders form the-subject matterof and. are claimed in anapplication for United States Letters Patent Serial'No. 400,608,

filed July 1, 1941, inthe name of Edwin W'. Smith. :1; i 1

The tool head is surrounded by the'usual housing 90, indicated partly by a dotted outline, in Figs. 1 and 4, which is provided with an opening in one side for the tool shifting lever. Located on the side of the housing 90 opposite to the shifting lever opening is a bar 92 which is arranged to interrupt rotation of thetool holder at a point about midway between the notches 22,

24 and to keep the tool holder in that position where the tools are well away from the tool heating means so long as the tool head is not in use and thereby preventing the tools becoming overheated. I r

The bar 92 is pivoted on a stud Hi and hangs in an out-of-the-way position (see broken-line position, Fig. 3) until'it is desired to remove the tools from proximity to the tool heating means during the time the ma'chine'headis tobe idle when the bar is swung up into the path of rotation of the tool carrier where it engages a shouldered pin 94 (Fig. 4) which juts out from the housing 90. When the bar is in' this position, it will stop'the rotation of the tool holder at a point where the tools are well removed from the usual heating means, herein illustrated as the gas jets m4, I06, which are located on opposite sides of the tool holder above and. below the notched portion of the head of the oscillating shaft.

To prevent wear between the bottom surfaces of the lugs 26, 28 and the inclined plates 39, 32 on the head of the oscillating-shaft while the tool holder is engaged by the bar 92, the bar is provided with a shouldered end portion which comprises a finger 96 and a 'rounded'knoblike projection 98. When it is desiredto move the tool holder to its inoperative position, the bar 92 is elevated, as shown in Figs. 1 and 3, so that its shouldered portion is located in the path of the tool carrier on the lug which is moving down the inclined plate 32. Thus the flange 65 on the tool carrier strikes the finger 96 causing the bar to rotate about its pivot I08, and as the bar rotates, the projection 98 engages beneath the tool 68 and the flange 6B and moves the tool holder outwardly from the head 28 of the oscillating shaft against the pull of the spring I8. The bar 92 rotates with the tool holder until the center line I02 of the bar moves. past the center line of the spring Hi When the bar engages the shouldered pin 94, a line Nil parallel to the center line of the spring being shown in Fig. 4. The bar will be held in this position by the pull of the spring 18 which acts through the tool carrier inwardly against the shoulder portion of the bar and tends to rotate it in a counterclockwise direction, as viewed in Fig. 4, thereby holding the bar against the pin 94. When the tool holder is in its inoperative position (Fig. 4), the bottom faces of the lugs 25, 28 are well clear of the inclined plates.

The bar 92, in addition to holding the lugs on the tool holder away from the inclined plates on the oscillating head while the tools are not in use, also holds the tool carrier stationary so that means forconnecting the tool holderto the shaft the screws 72 can be backed off, releasing the of the screws 12. This is an important feature as most edge settingfimachines are of the twin type in which two setting stations are provided and if the machine had to be shut down each time the toolswere changed both stations would be put out of operation while the change was be ing made. 7

Tool changes are effected'by backing of the screw 12 of the tool carrier opposite to the one engaged by the bar 92 and making the desired change; then, if it is desired vto change the tool which' is engaged by the bar, the tool holder is released from the bar, rotated through and the opposite tool carrier engaged by the bar as it comes around, and thetool holder again moved to its inoperative position, whereupon the second tool change can be made.

To release the tool holder from its inoperative position, the operatormoves the tool holder in a counterclockwise direction or downwardly as viewed in Fig. 4, until the tool carrier is clear of the bar 92 when the bar drops to its out-of-the way position, permittingthe machine to complete the shifting operation which was interrupted by the bar.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. In a finishing machine, an oscillating shaft,- a tool'holder having a plurality of tools rotatably mounted on said shaft, means for connecting the tool holder to the shaft to cause one of the tools to be secured in an operative position for oscillation with the shaft, means for heating the toolin operative position, means for rothe tools, and means for stopping the rotation of Y the tool holder in a position where the tools are removed from heating proximity to the heating means.

3. In a finishing machine, an oscillatingshaft, a tool holder rotatably mounted on said shaft,

to oscillate therewith, heating means disposed in proximity to the tools in the tool holder when the holder is connected to the shaft, means for rotating the tool holder to interchange the tools,

and a latch mounted on the machine adjacent to the .tool holder .and arranged for movement into and out of the path of the rotating holder, said latch when located in the path of the rotating holder being arranged to stop the rotation of the holder in a position where the tools are removed from proximity'to theheating means.

4. In a finishing machine, an oscillating shaft, a tool holder for a pair of tools rotatably mounted on said shaft, means for connecting the tool holder to the shaft for oscillation therewith, heating means disposed in proximity to both tools when the tool holder is connected to the a shaft, means for rotating the holder to interchange the tools, and a stop arranged formovement into the path of the rotating holder to interrupt the rotation of the holder in a position Where the tools are removed from proximity to the heating means, said stop comprising a pivoted bar and an abutment arranged to limit the movement of the bar inrthe direction of rota tion of the tool holder.

5. In a finishing machine, an oscillating shaft, a holder for a plurality of tools rotatably mounted on said shaft, means for rotating the tool holder about the shaft to interchange the tools, and pivoted means for stopping the rotation of the tool holder between the normal tool positions and for disconnecting the tool holder from the shaft so that the movements of the oscillating shaft are not transmitted to the tool holder.

6. In a finishing machine, an oscillating shaft, a holder for a plurality of tools rotatablymounted on the shaft, said shaft and said holder having cooperating faces oblique to the'direction' of oscillation of the shaft, means for holding said faces in abutting relation whereby the oscillations of the shaft in one direction are utilized 7 to rotate the tool holder about the shaft to cause an interchange of tools, and a pivoted member arranged to stop the rotation of the tool holder between normal tool positions and to move the cooperating faces on the shaft and the holder out of abutting engagement with each other.

'7. In a finishing machine, an oscillating shaft, a holder for a plurality of tools rotatably'mounted on said shaft, yieldable means for urging the tool holder toward the shaft, tool heating means, means for rotating the tool holder to interchange the tools, and a pivoted member arranged to stop the rotation of the tool holder in a position where the tools are removed from proximity to the heating means and to move the tool holder away from the oscillating shaft to disconnect the shaft from lized to rotate the holder about the shaft to cause an interchange of tools, a plurality of finishing tools connected to said holder by clamping means, and a pivoted member arranged to stop the rotation of the tool holder between normal tool positions and to move said tool holder away from the shaft to a position where the cooperating faces on' the shaft and the tool holder are out of contact with each other and the holder is held stationary so that the clamping means can be released and the finishing tools changed.

9. In a finishing machine, an oscillating shaft, a tool holder rotatably mounted on said shaft, driving connections between the shaft and the tool holder comprising an extension on the tool holder and oppositely-disposed notches in the shaft, the surfaces on the portions of the shaft which connect the notches being oppositely-inclined and extending obliquely to the direction of oscillation, means for lifting the extension on the tool holder out of a notch and'pla-cing it on the higher end portion of the adjacent inclined surfaces, and; means for positively preventing the tool holder extension from moving backwardly onto the lower end portion of the inclined surface on the opposite side of the notch.

10; In a finishing machine, an oscillating shaft, a tool holder rotatably mounted on said shaft,

driving connections between the shaft and the the holder and prevent oscillating movements of -ing said faces in abutting relation whereby the oscillations of the shaft in one direction are utitool holder comprising extensions on the tool holder and notches in the shaft, the surfaces on the portions of the shaft which connect, the notches being oppositely-inclined, a tool holder shifting lever for lifting the extensions on the tool holder out of the notches and placing them on the higher end portions of the adjacent inclined surfaces, and means for preventing the tool holder extensions from moving backwardly onto the lower end portions of the inclined surfaces on the opposite side of the notches, said means comprising a projection on the shifting lever located closely adjacent to and behind a cooperating surface on the tool holder.

LAURENCE E. TOPHAM. EDWIN W. SMITH. 

